//
//  LGTextField.m
//  VVdaGong
//
//  Created by LGSC on 2018/5/30.
//  Copyright © 2018年 gongyouzhijia. All rights reserved.
//

#import "LGTextField.h"
#import "cnhbMsgAlert.h"

@implementation LGTextField

-(instancetype)initWithFrame:(CGRect)frame
{
    if (self = [super initWithFrame:frame]) {
        
        self.delegate = self;
        [self addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
        return self;
    }
    return nil;
}

- (void)layoutMyTextField
{
    self.delegate = self;
    self.returnKeyType = UIReturnKeyDone;
    [self addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
}

#pragma mark --- UITextField delegate
/**
 判断是不是九宫格
 @param string  输入的字符
 @return YES(是九宫格拼音键盘)
 */
-(BOOL)isNineKeyBoard:(NSString *)string
{
    NSString *other = @"➋➌➍➎➏➐➑➒";
    int len = (int)string.length;
    for(int i=0;i<len;i++)
    {
        if(!([other rangeOfString:string].location != NSNotFound))
            return NO;
    }
    return YES;
}

/**
 *  判断字符串中是否存在emoji
 * @param string 字符串
 * @return YES(含有表情)
 */
- (BOOL)stringContainsEmoji:(NSString *)string {
    
    __block BOOL returnValue = NO;
    
    [string enumerateSubstringsInRange:NSMakeRange(0, [string length]) options:NSStringEnumerationByComposedCharacterSequences usingBlock:
     ^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
         
         const unichar hs = [substring characterAtIndex:0];
         // surrogate pair
         if (0xd800 <= hs && hs <= 0xdbff) {
             if (substring.length > 1) {
                 const unichar ls = [substring characterAtIndex:1];
                 const int uc = ((hs - 0xd800) * 0x400) + (ls - 0xdc00) + 0x10000;
                 if (0x1d000 <= uc && uc <= 0x1f77f) {
                     returnValue = YES;
                 }
             }
         } else if (substring.length > 1) {
             const unichar ls = [substring characterAtIndex:1];
             if (ls == 0x20e3) {
                 returnValue = YES;
             }
             
         } else {
             // non surrogate
             if (0x2100 <= hs && hs <= 0x27ff) {
                 returnValue = YES;
             } else if (0x2B05 <= hs && hs <= 0x2b07) {
                 returnValue = YES;
             } else if (0x2934 <= hs && hs <= 0x2935) {
                 returnValue = YES;
             } else if (0x3297 <= hs && hs <= 0x3299) {
                 returnValue = YES;
             } else if (hs == 0xa9 || hs == 0xae || hs == 0x303d || hs == 0x3030 || hs == 0x2b55 || hs == 0x2b1c || hs == 0x2b1b || hs == 0x2b50) {
                 returnValue = YES;
             }
         }
     }];
    
    return returnValue;
}

/**
 *  判断字符串中是否存在emoji
 * @param string 字符串
 * @return YES(含有表情)
 */
- (BOOL)hasEmoji:(NSString*)string;
{
    NSString *pattern = @"[^\\u0020-\\u007E\\u00A0-\\u00BE\\u2E80-\\uA4CF\\uF900-\\uFAFF\\uFE30-\\uFE4F\\uFF00-\\uFFEF\\u0080-\\u009F\\u2000-\\u201f\r\n]";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", pattern];
    BOOL isMatch = [pred evaluateWithObject:string];
    return isMatch;
}


/**
 *  删除字符串中存在的表情
 */
- (NSString *)disable_emoji:(NSString *)text{
    NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"[^\\u0020-\\u007E\\u00A0-\\u00BE\\u2E80-\\uA4CF\\uF900-\\uFAFF\\uFE30-\\uFE4F\\uFF00-\\uFFEF\\u0080-\\u009F\\u2000-\\u201f\r\n]"options:NSRegularExpressionCaseInsensitive error:nil];
    NSString *modifiedString = [regex stringByReplacingMatchesInString:text
                                                               options:0
                                                                 range:NSMakeRange(0, [text length])
                                                          withTemplate:@""];
    return modifiedString;
}


-(void)LGShowMsg:(NSString*)str{
    
//    cnhbMsgAlert *alert = [[cnhbMsgAlert alloc] init];
//    [alert setTextColor:[UIColor whiteColor]];
//    [alert showMessage:str];
    [SVProgressHUD showErrorWithStatus:str];
}

- (void)textFieldDidEndEditing:(UITextField *)textField
{
    if ([self stringContainsEmoji:textField.text]) {
        [self LGShowMsg:@"禁止输入表情,请重新输入"];
        NSLog(@"有表情");
    }
    if (_my_delegate && [_my_delegate respondsToSelector:@selector(LGtextFieldDidEndEditing:)]) {
        [_my_delegate LGtextFieldDidEndEditing:textField];
    }
}

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    if (_my_delegate && [_my_delegate respondsToSelector:@selector(LGtextField:LGshouldChangeCharactersInRange:replacementString:)]) {
        [_my_delegate LGtextField:textField LGshouldChangeCharactersInRange:range replacementString:string];
    }
    if ([textField isFirstResponder]) {
        //判断键盘是不是九宫格键盘
        if ([self isNineKeyBoard:string] ){
            return YES;
        }else{
            if ([self hasEmoji:string] || [self stringContainsEmoji:string]){
                [self LGShowMsg:ForbiddenMsg];
                return NO;
            }
        }
        if ([[[textField textInputMode] primaryLanguage] isEqualToString:@"emoji"] || ![[textField textInputMode] primaryLanguage]) {
            [self LGShowMsg:ForbiddenMsg];
            return NO;
        }
    }
    
    if ([string isEqualToString:@"\n"]) {
        [textField resignFirstResponder];
        return NO;
    }
   
    return YES;
    
}

- (void)textFieldDidChange:(UITextField *)TextField
{
    if (TextField.text.length > 0 && [self stringContainsEmoji:TextField.text]) {
        
        [self LGShowMsg:ForbiddenMsg];
        NSLog(@"有表情");
        // 禁止系统表情的输入
        NSString *text = [self disable_emoji:[TextField text]];
        TextField.text = text;
//        if (![text isEqualToString:TextField.text]) {
//            NSRange textRange = [textView selectedRange];
//            TextField.text = text;
//            [textView setSelectedRange:textRange];
//        }
    }
    if (_my_delegate && [_my_delegate respondsToSelector:@selector(LGTextFieldDidChanged:)]) {
        [_my_delegate LGTextFieldDidChanged:TextField];
    }
}


@end
